| Delta Iron | ||||
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| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Definition: When pure or practically carbon-free iron is cooled from above its melting point it solidifies at about 1535oC as delta iron having a body-centred cubic lattice structure, which persists down to about 1400oC. On further cooling it undergoes an allotropic change to gamma iron which has a face-centred cubic lattice and is non-magnetic.
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